Our 1943 CPO Shirt is a classic US-Navy deck-shirt. These shirts were originally produced for cold weather conditions and meant to be an additional warm layer to wear underneath the N1-Deck Jackets. Because of the heavy wool-quality, the 1943 CPO shirt is also warm enough to withstand the elements even without an N-1 Deck Jacket. The following details characterize our 1943 CPO shirt - 100 % Merino wool - authentic cut - Made in Portugal